Yu, D. C. T., Spevack, S., Hiebert, R., Martin, T. L., Goodman, R., Martin, T. et al. (2002). Happiness indices among persons with profound and severe disabilities during leisure and work activities: A comparison. Education and Training in Mental Retardation and Developmental Disabilities, 37, 421-426.

has been cited by the following article:

• TITLE: Happiness as Surplus or Freely Available Energy

  AUTHORS: Matthew T. Gailliot

  KEYWORDS: Happiness; Emotion; Energy; Efficiency

  JOURNAL NAME: Psychology, Vol.3 No.9, September 25, 2012

  ABSTRACT: This paper presents a literature review that indicate happiness as a state of freely available or surplus energy. Happiness is associated with good metabolism and glucose levels, fewer demands (from parenting, work, difficult social relationships, or personal threats), and goal achievement, as well as increased ease of processing, mental resources, social support, and monetary wealth. Each of these either provide or help conserve energy.